AP&T is introducing a new energy-saving technology in its hydraulic presses called ‘Frequency Drive System’. The company says it has been testing the new system in both simulated testing environments and under actual operating conditions with customers. The system controls the speed of the electrical engines, which then control the load-sensing hydraulic system. The company claims this means the system can quickly reduce the speed of the electrical engines as well as quickly start them.
The principle is similar to the start/stop system found in some modern passenger cars. The test results are positive. Since utilisation of the electrical engines is optimised to when they are really needed, it is possible to save up to 40% of the energy costs for the press, claims AP&T.